US3635651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner
Assignee: BP PLC
•
Filing: 1970-03-31
•
Granted: 1972-01-18
•
Expires: 1990-03-31
Abstract
Abstract A burner, preferably of rigid material such as metal foam which is pierced by airholes for the passage of combustion air and arranged to carry fuel across the combustion zone. Conveniently the burner has an evaporator in which the airholes are situated and a feeder for lifting fuel to the level of the evaporator. In the preferred configuration gravity assists fuel transfer. For example, the evaporator comprises two sloping portions joined together at their lowest portions and each joined to a feeder at its highest portion.
Inventors
- 👤 Denis Henry Desty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:39
CPC Classifications
F; F23; F23D; F23D3/00; F23D3/02; F23D3/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
206 words
An anisotropic burner which comprises an evaporator less than 10-mm. thick and having a body of porous material for holding liquid fuel in its pores by surface tension to provide a reservoir of liquid fuel contained in the evaporator from which fuel may be evaporated into a combustion zone adjacent to one surface of the evaporator by transfer of heat from the combustion zone, said body of porous material being pierced by airholes for conducting air through the evaporator to said combustion zone, said airholes being arranged so that, during use of the evaporator as a component of a burner burning a vaporizable fuel, combustion takes place in said combustion zone between air flowing through the airholes and fuel evaporated from said reservoir, and the pores of said porous material being smaller measured in the direction of the airflow than at right angles thereto so as to offer a lower resistance to liquid fuel flow in said reservoir in directions across the combustion zone than in the direction of airflow and facilitate flow of fuel in directions across the combustion zone to achieve uniform fuel distribution in replenishment of fuel lost by evaporation from said reservoir while hindering fuel flow against the direction of said airflow.
Claim 2
Dependent Claim
206 words
An anisotropic burner which comprises an evaporator less than 10-mm. thick and having a body of porous material for holding liquid fuel in its pores by surface tension to provide a reservoir of liquid fuel contained in the evaporator from which fuel may be evaporated into a combustion zone adjacent to one surface of the evaporator by transfer of heat from the combustion zone, said body of porous material being pierced by airholes for conducting air through the evaporator to said combustion zone, said airholes being arranged so that, during use of the evaporator as a component of a burner burning a vaporizable fuel, combustion takes place in said combustion zone between air flowing through the airholes and fuel evaporated from said reservoir, and the pores of said porous material being smaller measured in the direction of the airflow than at right angles thereto so as to offer a lower resistance to liquid fuel flow in said reservoir in directions across the combustion zone than in the direction of airflow and facilitate flow of fuel in directions across the combustion zone to achieve uniform fuel distribution in replenishment of fuel lost by evaporation from said reservoir while hindering fuel flow against the direction of said airflow.
Claim 3
Dependent Claim
48 words
A burner according to claim 1, which also comprises a fuel bath and in which said evaporator comprises, at least one downwardly depending feeder adapted to dip in said fuel bath whereby, during use in a said burner, liquid fuel is raised to the level of the evaporator.
Claim 4
Dependent Claim
48 words
A burner according to claim 1, which also comprises a fuel bath and in which said evaporator comprises, at least one vertically downwardly depending feeder adapted to dip in said fuel bath whereby, during use in said burner, liquid fuel is raised to the level of the evaporator.
Claim 5
Dependent Claim
30 words
A burner according to claim 1, in which the evaporator comprises a portion downwardly sloped in the direction of fuel flow and at an angle of 20*-70* to the horizontal.
Claim 6
Dependent Claim
38 words
A burner according to claim 4, in which the evaporator comprises two portions, each downwardly sloped in the direction of fuel flow, each at an angle of 20*-70* to the vertical and joined together at their lowest regions.
Claim 7
Dependent Claim
13 words
A burner according to claim 5, in which each sloping portion is rectangular.
Claim 8
Dependent Claim
21 words
A burner according to claim 5, in which each downwardly sloped portion is at an angle of 40*-50* to the horizontal.
Claim 9
Dependent Claim
13 words
A burner according to claim 7, in which each sloping portion is rectangular.
Claim 10
Dependent Claim
16 words
A burner according to claim 8, in which the evaporator is less than 5 mm. thick.
Claim 11
Dependent Claim
16 words
A burner accorDing to claim 9, in which the evaporator is less than 3 mm. thick.
Claim 12
Dependent Claim
12 words
A burner according to claim 1, in which the evaporator is rigid.
Claim 13
Dependent Claim
15 words
A burner according to claim 11 in which the evaporator is made of porous metal.
Claim 14
Dependent Claim
15 words
A burner according to claim 12 in which the evaporator is made of metal foam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |